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Finding the Fourth Proportional to 60,490.78, 90,707.55 and 21,042.97

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Solution

The fourth proportional to 60,490.78, 90,707.55 and 21,042.97 is: 31,554.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,490.78 : 90,707.55 = 21,042.97 : x
  2. Step 2: Convert to fraction form
    60,490.78/90,707.55 = 21,042.97/x
  3. Step 3: Cross multiply
    60,490.78x = 90,707.55 × 21,042.97
  4. Step 4: Simplify right side
    60,490.78x = 1,908,756,253.42
  5. Step 5: Solve for x
    x = 1,908,756,253.42/60,490.78
  6. Step 6: Final answer
    x = 31,554.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.